Supersensitizing combinations of merocyanine dyes

ABSTRACT

COMBINATIONS OF AT LEAST ONE SIMPLE MEROCYANINE, MEROCARBOCYANINE OR MERODICARBOCYANINE DYE WITH AT LEAST ONE SULFONIC ACID DERIVATIVE OF A BIS(TRIAZINYLAMINO) STILBENE, A DIBENZOTHIOPHENE DIOXIDE, A BIPHENYL, A TERPHENYL, A QUATERPHENYL, A PHENANTHRENE, A PYRENE, OR A CHRYSENE ARE USED ADVANTAGEOUSLY TO SUPERSENSITIZE PHOTOGRAPHIC SILVER HALIDE EMULSIONS.

United States Patent O 3,575,869 SUPERSENSITIZING COMBINATIONS F MEROCYANINE DYES Norman W. Kalenda, Rochester, N.Y., assignor to Eastman Kodak Company, Rochester, N.Y. Filed Dec. 4, 1967, Ser. No. 711,464 Int. Cl. 009k 3/00 U.S. Cl. 252--182 18 Claims ABSTRACT 0F THE DISCLOSURE Combinations of at Yleast one simple merocyanine, merocarbocyanine or merodicarbocyanine dye with at least one sulfonic acid derivative of a bis(triazinylamino) stilbene, a dibenzothiophene dioxide, a biphenyl, a terphenyl, a quaterphenyl, a phenanthrene, a pyrene, or a chrysene are used advantageously to supersensitize photographic silver halide emulsions.

This application is a divisional application of Kalenda U.S. Ser. No. 598,570, filed Oct. 20, 1966, now U.S. Pat. 3,416,927, which is a continuation-impart application of Kalenda U.S. Ser. No. 416,714, filed Dec. 8, 1964. Kalenda U.S. Ser. No. 416,714 was expressly abandoned Oct. 20, 1967.

This invention relates to photographic silver halide emulsions containing simple merocyanine, merocarbocyanine or merodicarbocyanine dyes, and in supersensitizing combination therewith, certain sulfonated compounds.

It is known in the art of making photographic emulsions that certain dyes of the cyanine class alter the sensitivity of gelatino-silver-halide photographic emulsions when the dyes are incorporated in the emulsions. It is also known that the sensitization produced by a given dye varies somewhat with the type of emulsion in which the dye is incorporated. Furthermore, the sensitization of a given emulsion by a given dye may be altered by varying the conditions in the emulsion. For example, the sensitization may be increased by increasing the silver ion concentration or decreasing the hydrogen ion concentration (i.e., increasing the alkalinity), or both. Thus, sensitization can be increased by bathing plates, coated with a spectrally sensitized emulsion, in water or in aqueous solutions of ammonia. Such a process of altering the sensitivity of a sensitized emulsion by increasing the silver ion concentration and/ or by decreasing the hydrogen ion concentration is commonly called hypersensitization Hypersensitized emulsions have generally poor keeping qualities. Various combinations of two or more sensitizing dyes have also been proposed to alter the sensitivity of such emulsions.

I have now found that photographic emulsions containing simple merocyanine, or merocarbocyanine or merodicarbocyanine dyes are markedly increased in svensitivity by incorporating therewith certain sulfonated compounds. This method is designated herein as supersensitization and the combinations of dyes as supersensitizing combinations.

It is, therefore, an object of my invention to provide photographic emulsions containing simple merocyanine, merocarbocyanine, or merodicarbocyanine dyes and, in supersensitizing combination therewith, certain sulfonated compounds. Another object is to provide methods for making these emulsions. Other objects will become apparent from a consideration of the following description and examples.

The simple merocyanine, merocarbocyanine and merodicarbocyanine dyes useful in practicing my invention ice comprise those dyes represented by the following general formulas:

In f "z A c R nn(cH-cH)-5;-IC(=LL n- II. llli-` bcn-cs W -LtaL-L) e-'f'.

iii-im H31 n: a

wherein each A represents an oxygen or sulfur atom, each R represents an alkyl group having from 1 to 8 carbon atoms, eg., methyl, sulfoethyl, carboxyethyl, hydroxypropyl, sulfobutyl, carboxybutyl, hexyl, octyl, etc., or an aryl group, e.g., phenyl, sulfophenyl, carboxyphenyl, tolyl, etc.; Z represents the nonmetallic atoms required to complete a 5- to 6membered heterocyclic nucleus such as those selected from the class consisting of a thiazole nucleus (e.g., thiazole, 4-methylthiazole, 4-phenylthiazole, S-methylthiazole, 5-phenylthiazole, 4,5-dimethylthiazole, 4,5-diphenylthiazole, 4-(2-thienyl)thiazole, etc.), a benzothiazole nucleus (e.g., benzothiazole, 4-chlorobenzothiazole, 5 chlorobenzothiazole, 6 chlorobenzothiazole, 7-chlorobenzothiazole, 4rnethylbenzothiazole, S-methylbenzothiazole, 6methylbenzothiazole, 5-bromobenzothiazole, 6 bromobenzothiazole, 4 phenylbenzothiazole, 5-phenylbenzothiazole, 4-methoxybenzothiazole, 5 -methoxybenzothiazole, -methoxybenzothiazole, 5i0doben zothiazole, -iodobenzothiazole, 4ethoxybenzothiazole, 5-ethoxybenzothiazole, tetrahydrobenzothiazole, 5,6-dimethoxybenzothiazole, 5,6 dioxymethylenebenzothiazole, S-hydroxybenzothiazole, 6-hydroxybenzothiazole, etc.), a naphthothazole nucleus (e.g., a-naphthothiazole, -naphthothiazole, S-methoxy-, -naphthothiazole, 5ethoXy naphthothiazole, 8 methoxy-ot-naphthothiazole, 7-methoxy-a-naphthothiazole, etc.), a thionaphtheno7,6,4,5- thiazole nucleus (e.g., 4methoxythianaphtheno7,6,4,5- thiazole, etc.), an oxazole nucleus (e.g., 4-methyloxazole, S-methyloxazole, 4-phenyloxazole, 4,5-diphenyloxazole, 4-ethyloxazole, 4,5-dimethyloxazole, S-phenyloxazole, etc.), a benzoxazole nucleus (e.g., benzoxazole, 5-chlorobenzoxazole, 5methylbenzoxazole, S-phenylbenzoxazole, 6-methylbenzoxazole, 5,6-dimethylbenzoxazole, 4,6-dimethylbenzoxazole, 5 -methoxybenzoxazole, 5-ethoxybenzoxazole, 5-chlorobenzoxazole, 6methoxybenzoxazole, 5hydroxybenzoxazole, 6-hydroxybenzoxazole, etc.), a naphthoxazole nucleus (e.g., a-naphthoxazole, -naphthoxazole, etc.), a selenazole nucleus (e.g., 4-methy1- selenazole, 4-phenylselenazole, etc.), a benzoselenazole nucleus (e.g., benzoselenazole, 5chlorobenzoselenazole, 5 methoxybenzoselenazole, 5 hydroxybenzoselenazole, tetrahydrobenzoselenazole, etc.), a naphthoselenazole nucleus (e.g., nt-naphthoselenazole, [ii-naphthoselenazole, etc.), a thiazoline nucleus (e.g., thiazoline, 4-methylthiazoline, etc.), a Z-pyridine nucleus (e.g., Z-pyridine, 5methy12pyridine, etc.), a 2-quinoline nucleus (e.g., 2-qinoline, 3-methyl 2 quinoline, 5-ethyl-2-quinoline, 6-chloro-2-quinoline, 8-chloro-2-quinoline, 6-methoXy-2- quinoline, S-ethoxy-Z-quinoline, S-hydroXy-Z-quinoline, etc.), a 4-quinoline nucleus (e.g., 4quinoline, -methoxy- III.

4-quinoline, 7-methyl-4-quinoline, 8-chloro-4-quno1ine, etc.), a 1isoquinoline nucleus (e.g., 1isoquinoline, 3,4- dihydro-l-isoquinoline, etc.), a 3-isoquinoline nucleus (e.g., 3-isoquinoline, etc.), a 3,3-dialkylindolenine nucleus (e.g., 3,3-dimethylindolenine, 3,3,S-trimethylindolenine, 3,3,7-trimethylindolenine, etc.), an imidazole nucleus (e.g., imidazole, l-alkylimidazole, 1-alky1-4-phenylirnidazole, 1-alky1-4,S-dirnethylirnidazole, etc.), a benzimidazole nucleus (e.g., benzimidazole, l-alkylbenzimidazole, 1-aryl-S,-dichlorobenzirnidazole, etc.), a naphthirnidazole nucleus (e.g., 1-alkyl-ot-naphthimidazole, 1-aryl-- naphthimidazole, 1 alkyl-S-methoxy-a-naphthimidazole, etc.), etc.; L represents a methine group (e.g., CDI- where D represents hydrogen, a lower alkyl group, such as, methyl, ethyl, butyl, etc., and an aryl group, such as phenyl, tolyl, naphthyl, etc.) such that not more than one L group contains a D group that is other than the hydrogen atom; j, m, and p each represent an integer of from l to 2; k represents an integer from 2-3; n represents an integer of from l to 3; Q represents a group, such as,

etc., in which R is as described previously; R1 represents any of the groups used on the 3-position of Z-pyrazolin- 5-ones, eg., hydrogen, alkyl (e.g., methyl, isopropyl, tertiary butyl, hexyl, etc.), aryl (e.g., phenyl, tolyl, halophenyl, etc.), amino (e.g., methylamino, diethylamino, phenylamino, etc.), acylarnino (e.g., acetylamino, propionylamino, butyrylamino, benzoylamino, etc.), substituted sulfonamido (e.g., butylsulfonamido, phenylsulfonamido, etc.) substituted sulfamyl (e.g., propylsulfamyl, phenylsulfamyl, etc.), substituted carbamyl (e.g., ethylcarbamyl, phenylcarbamyl, etc.); W represents the sulfur, selenium or the oxygen atom; Y and Y1 each represent a group selected from the class consisting of the hydrogen atom, an alkyl group (e.g., methyl, ethyl, butyl, etc.), an aryl group (e.g., phenyl, tolyl, etc.), a

group; q represents an integer of from 1 to 6, R2, R3, and R4 each represents an alkyl group (e.g., methyl, propyl, butyl, carboxyethyl, hydroxypropyl, sulfobutyl, hexyl, etc); R5, R6, R1, R8, and R9 each represents a member selected from the class consisting of the hydrogen atom and an alkyl group (e.g., methyl, ethyl, butyl, carboxyethyl, hydroxypropyl, sulfobutyl, etc); and X represents an acid anion (e.g., chloride, bromide, iodide, perchlorate, sulfomate, thiocyanate, p-toluenesulfonate, benzenesulfonate, methylsulfate, etc.).

The dyes of Formulas I, II, and III above, wherein at least one of the members Y and Y1 contains a group with a tertiary nitrogen atom and more particularly the said group -(CHz),1-NR2R3 wherein q, R2 and R3 are as previously defined, are particularly eflicacious in the super-sensitizing combinations of my invention and are the preferred dye species.

Many of the dye sensitizers embraced by Formulas I and II above have been previously described in the prior art. For instance, such dyes can be prepared according to the methods described in Brooker et al., U.S. Pat. No.

2,161,331, issued June 6, 1939; Brooker U.S. Pat. No. 2,170,807, issued Aug. 29, 1939; Brooker U.S. Pat. 2,177,- 401, issued Oct. 24, 1939; Brooker U.S. Pat. 2,185,182, issued Jan. 2, 1940; Brooker U.S. Pat. 2,211,762, issued Aug. 20, 1940; Brooker et al. U.S. Pat. 2,493,748, issued Jan. 10, 1950; Van Lare et al. U.S. Pat. 2,548,571, issued Apr. 10, 1951; Brooker et al. U.S. Pat. 2,856,404, issued Oct. 14, 1958; Jelireys U.S. Pat. 2,719,152, issued Sept. 27, 1955, etc. The preferred merocyanine type sensitizing dyes can be prepared as described in copending application Ser. No. 364,808, led May 4, 1964, of Robert C. Taber, Leslie G. S. Brooker.

The sulfonated derivatives useful in practicing my invention comprise polynuclear aromatic compounds containing at least one sulfo group. The term polynuclear aromatic as used herein is intended to mean 2 or more benzene rings fused together (for example, as in naphthalene, pyrene, etc.) or at least 2 benzene rings or aromatic rings directly joined together (for example, as in diphenyl, terphenyl, quaterphenyl, etc.) or through an aliphatic linkage. Such sulfonated derivatives can conveniently be represented by the following general formula:

(1V) Rl-SOaM wherein R1 represents a polynuclear aromatic group as defined above and M represents a hydrogen atom or a water-soluble cation salt group (e.g., sodium, potassium, ammonium, triethylammonium, triethanolammonium, pyridinium, etc.). Among the most useful of the sulfonaated derivatives embraced by Formula IV above are the compounds represented by the following general formula:

@erben-B2 SOSM N N R12- \-NH N13-f $111 N N N L SO3M SOSM Ria Rn wherein M has the values given above and R10, R11, R12, R11, each represents a hydrogen atom or a substituent group, such as hydroxyl, aryloxyl (e.g., phenoxyl, o-toloxyl, p-sulfophenoxyl, etc.), alkoxyl (e.g., methoxyl, ethoxyl, etc.), a halogen atom (e.g., chlorine, bromine, etc.), a heterocyclic radical (e.g., morpholinyl, piperidyl, etc.), an alkylthio group (e.g., methylthio, ethylthio, etc.), an arylthio group (e.g., phenylthio, tolylthio, etc.), a heterocyclylthio group (e.g., benzothiazylthio, etc.), an amino group, an alkylamino` group (e.g., methylamino, ethylamino, propylamino, dimethylamino, diethylamino, dodecylarnino, cyclohexylamino, -hydroxyethylamino, di--hydroxyethylamino, /S-sulfoethylamino, etc.), an arylamino group (e.g., anilino, o, m, and p-sulfoanilino, o, m, and p-chloranilino, o, m, and p-ansylamino, o, m, and p-toluidino, o, m, and p-carboxyanilino, hydroxyanilino, sulfonaphthylamino, o, m, and p-aminoanilino, o-acetaminoanilino, etc.), etc.

Rm- Ria wherein R14 is an acylamido group (e.g., acetarnido,

benzamido, 2,4-diethoxybenzamido, p-tolylamido, 4-methyl-Z-methoxybenzamido, l-naphthoylamino, 2-naphthoylamino, 2,4-dimethoxybenzamido, 2-phenylbenzamido, 2- thienylbenzamido) or a sulfo group, R13 represents an acrylamido group (e.g., as deiined by R11 above) or a sulfoaryl group (e.g., sulfophenyl, psulfodiphenyl, etc.) and R11,l represents a hydrogen atom or a sulfo group, said compound containing at least one sulfo group.

Still other useful sulfonated derivatives of Formula IV above include compounds containing diphenyl, terphenyl, quaterphenyl, phenanthrene, pyrene, chrysene, etc., nuclei. Many of the above delined sulfonated compounds are shown in Jones U.S. Pat. 2,961,318, issued Nov. 22, 1960.

Included among the simple merocyanine, merocarbocyanine and merodicarbocyanine dyes of Formulas I, II, and III are the following typical examples.

Dye No. Dye Name nedionc.

LIX 5-[3-(1,2-dihydropyrroloi2,l-b]benzothiazolyl)-methylene1- B-ethylrhodanine.

LX 5-(1,2-dihydropyrrolo[1,2-a]quinol-B-ylmethylcnc)-3- ethylrhodanine.

LXI 5- (1 ,2-dihydropyrrolo[1 ,2-a]quinol-B-ylmethylene) -3- ethyl-Lphenyl-Z-thohydantoin.

LXIII 5-(1 ,2-dihydropyrrololl ,2a]quinol-3-ylmctliylene) -1- etliyl-2-tliiobarbituric acid.

Included among the sulfonated derivatives of Formula IV above are the following typical examples.

Com-

pound Name A Calcoour White-MR. This is the trade name for a bis(striaZin-Z-ylamino)stilbene-Z,2/-disulfonic acid, sodium salt.

B Leucophor B. This is the trade name for a bis(atriazin2- ylamino)stilbene2,2'disulfonic acid, soldum salt.

C Sodium 6-(4-inethoxy-S-sulo-w-phenylacryloyl)-pyrene.

D 3,4-bis (4emethoxy-B-suliobenzamido) dibenzothohene dioxide,

sodium salt.

F Chrysene-dsulfonic acid, sodium salt.

ylamino stilbene2,2disu1fonic acid, disodium salt.

partially hydrolyzed polyvinyl acetate, poly N-vinylpyrrolidone, etc., which has no deleterious eiect on the lightsensitive silver halide. My emulsions advantageously contain color-forming couplers.

The optimum concentration of an individual sensitizing dye can be determined in a manner Well known to those skilled in this art by measuring the sensitivity of a series of test portions of the same emulsion, each portion containing a different concentration of the sensitizing dye. The optimum concentration of one supersensitizing combination can, of course, be readily determined in the same manner, by measuring the sensitivity of a series of test portions of the same emulsion, each portion containing dilerent concentrations of the components in the cornbination. In determining the optimum concentration for the super-se'nsitizing combination, it as advantageous to employ, at lirst, a concentration of the merocyanine dye less than its optimum concentration. The concentrations of the dye can then be increased until the optimum concentration of the supersentizing combination is determined.

The methods of incorporating sensitizing dyes in silver halide emulsions are well known to those skilled in the art and these known techniques are employed in dispersing the simple merocyanine, merocarbocyanine and merodicarbocyanine dyes, and the sulfonated derivates, of my invention in the emulsions. The dye and sulfonated derivative can be directly dispersed in the emulsions, or they can first be dissolved in some convenient solvent, such as pyridine, methyl alcohol, acetone, water, etc. (or mixtures of such solvents), or diluuted with water in some instances, and added to the emulsions in the form of these solutions. If desired, they can be separately dissolved in a given solvent and added separately to the emulsion, or they can be dissolved in the same or different solvent and these solutions mixed together before addition is made to the silver halide emulsions. The simple merocyanine, merocarbocyanine and merodicarbocyanine dyes, and the sulfonated derivatives, can be dispersed in the iinished emulsions and should be uniformly distributed throughout the emulsions before the emulsions are coated on a suitable support, such as paper, glass, cellulose ester ilm polyvinyl resin iilm (e.g., polystyrene film, polyvinyl chloride film, etc.), polyester film, etc. The following procedure has been found quite satisfactory. Stock solutions of the simple merocyanine, merocarbocyanine and merodicarbocyanine dyes, and the sulfonated derivatives, are prepared by separately dissolving these in appropriate solvents as described above. Then, to the owable silver halide emulsion, the desired amount of Stock solution of one of the dyes is slowly added while stirring the emulsion. Stirring is continued until the dye is thoroughly incorporated in the emulsion. Then, the desired amount of stock solution of the sulfonated derivative is slowly added to the emulsion while stirring. Stirring in continued until thoroughly incorporated in the emulsion. The supersensitized emulsions can then be coated on a suitable support and the coating allowed to dry. In some instances, it may be desirable to heat the supersensitized emulsion for a few minutes before coating onto the suitable support. The details of such coating techniques are well known to those skilled in the art. The foregoing procedure is to be regarded only as illustrative. Clearly, my invention is directed to any silver halide emulsion containing a combination of the aforesaid simple merocyanine, merocarbocyanine, or merodicarbocyanine dyes, and sulfonated derivates of Formula IV above, whereby a supersensitizing effect is obtained.

Typical color-forming couplers used to advantage in my emulsions include the following:

Phenolic and naphtholic cyan-dye-forming couplers p-amylphenoxybenzenesulfonamino l-naphthol 5 (N-benzyl-N-naphthalenesulfonamino) l -naphthol 5 (n-benzyl- N-n-valerylamino l-naphthol 5-caproylamino-l-naphthol Phenolic `and naphtholic cyan-dye-forming couplers-Continued 2-chloro-5- N-n-valeryl-N-p-isopropylbenzylamino) l-naphthol 2,4-dichloro-5- (p-nitrobenzoyl--o-hydroxyethylamino) l-naphthol 2,4-dichloro-S-palmitylaminol-naphthol 2,2dihydroXy-5 ,5 '-dibromostilbene 5-diphenylethersulfonamidol-naphthol 1-hydroXy-2- N-isoamyl-N-phenyl naphthamide l-hydroxy-Z- N-p-sec.-amylphenyl naphthamide S-hydroXy-l-a-naphthoyl-1,2,3 ,4-tetrahydroquinoline 2-lauryl-4-chlorophenol 1-naphthol-Z-carboxylic-a-naphthalide l-naphthol-5-sulfcrcyclohexylamide S-phenoXyacetaminol-naphthol S-,B-phenylpropionylaminol-naphthol Monochlor-t- (N-y-phenylpropyl-N-p-sec.-amylbenozylamino l-naphthol l-acetylamino-5-methylphenol 2-benzoylamino-3 ,5 -dimethyl phenol Z-a- (p-tert.amylphenoxy n-butyrylamino-S- methylphenol Y 1-hydroxy-2- 2,4-di-tert.-amylphenoXy-nbutyl] naphthamide Z-otp-tert.-amylphenoxy -n-butyrylamino-l-chloro-S- methylphenol 2- (p'-tert.-amylphenoXy-p-benzoyl) amino-4-chloro-5- methyl phenol 2- (4-tert.amyl3 '-phenoxylbenzoylamino -3 ,5-

dimethyll-phenol 2-phenylacetylamino-4-chloro-S-methylphenol 2-benzolyamino-4-chloro-S-methylphenol 2-anilinoacetylamino-4-chloro-S-methylphenol 2- {4 a- 4"-tert.-amylphenoxy -nbutyrylamino] benzoylamino}4-chloro-5-methylpheno1 2-p-nitrobenzoylamino-4-chloro-S-methylphenol 2-rn-aminobenzoyl-4-chloro-5-methylphenol 2 4sec.amylbenzamino) -4-chloro-5-methylphenol 2 (4namyloxybenzamino -4-chloro-5-methylphenol 2 4phenoxybenz0ylamino phenol 2 (4"-tert.amyl-3 '-phenoxybenzoylamino phenol 2- [a- (4tert.butylphenoxy propionylamino phenol 2- [a- (4-tert.amyl) phenoxypropionylamino] phenol 2- 4-tert.amyl-3 '-phenoxybenzoylamino) -3- methyll -phenol 2- 4-tert.amyl3 '-phenoxybenzoylamino -3 ,6-

dimethylphenol 2,6-di (4"-tert.-amyl-3'-phenoxybenzoylamino l-phenol 2-- (4'tert.-amylphenoxyl butyrylaminol-phenol 2- (o-acetamido--phenylethyl l-hydroxynaphthamide 2 4-tert.amyl3 '-phenoxybenzoylamino -3,5 -dimethyll-phenol 2- [a- 4-tert.amylphenoxyl -n-butyrylamino] -5- methyll-phenol 2 4"tert.amyl-3 '-phenoxybenzoylamino) -4-chlorol-phenol 3- [ot- 4-tert.amylphenoxy -n-butyrlarnino] -6- chlorophenol 3- 4-tert.amyl3 '-phenoxybenzoylamino) phenol 2- a- 4-tert.amylphenoxy -n-butyrylamino] -6- chloro phenol 3 a- (4-tert.amylphenoxy -n-butyrylamino -4- chlorophenol 3- a- 4tert.-amylphenoxy -n-butyrylamino] -5- chloro phenol Phenolic and naphtholic cyan-dye-forming couplers-Continued 3- [a- (4tert.amylphenoxy) -n-butyrylamno] -2- chlorophenol 2-a- (4-tert.amylphenoxybutyrylamino) -5-chlorophenol 2- (4"-tert.amyl3'-phenoxybenzoylamino) -3- chlorophenol S-benzene sulfonamino-l-naphthol 2,4-dichloro-5 -benzene sulfonaminol-naphthol 2,4-dichloro-5- (p-toluenesulfonamino l-naphthol 5-( l,2,3,4-tetrahydronaphthalene--sulfamide) 1- naphthol 2,4-dichloro-5- (4bromodiphenyl--l-sulfonamino) lnaphthol 5 quinoline-S -sulfamino -1-naphthol Pyrazolone and coumarone magenta-dye-formin g couplers 2-cyanoacetyl-5- (p-sec.-amylbenzolylamino) coumarone 2-cyanoacetylcoumarone-S- (n-amyl-psec.-amylsulfanilide) 2-cyano acetylcoumarone-S- (N-n-amyl-p-tert.amyl

sulfanilide) 2-cyanoacetylcoumarone-S-sulfon-N-n-butylanilide 2-cyanoacetyl-S-benzoylamino-coumarone 2-cyanoacetylcoumarone-S-sulfondimethylamide 2-cyanoacetylcoumarone-S-sulfon-N-methylanilide 2-cyanoacetylnaphthalene sulfon-N-methylanilide 2-cyanoacetylcoumarone-5 (N-fy-phenylpropyl) -p-tert.-

amyl-sulfonanilide l-p-laurylphenyl-3 -methyl-S-pyrazolone l--naphthyl-S -amyl-S-pyrazolone l-p-nitrophenyl-3 -n-amyl-S -pyrazolone l-p-phenoXyphenyl-3 -n-amyl-S-pyrazolone l-phenyl-3 -n-amyl-S-pyr azolone 1,4-pheny1ene bis-3 l-phenyl-S-pyrazolone) 1-phenyl-3-aoetylamino-S-pyrazolone l-phenyl-3-propionylamino-5-pyrazolone l-phenyl-3-n-valerylamino-S -p yrazolone 1-phenyl-3-chloroacetylamino-S-pyrazolone 1-phenyl-3 -dichloroacetylamino-S-pyrazolone l-phenyl-3 -benzoylamino-5-pyrazolone 1-phenyl-3- (m-aminobenzoyl) amino-'S-pyrazolone l-phenyl-3- (p-sec.-amylbenzoylamino -S-pyrazolone l-phenyl-3 -diamylb enzoyla-mino-S-pyr azolone l-phenyl-3 --naphthoylamino-S -pyrazolone 1-phenyl-3 -phenylcarbamylamino-S-pyrazolone 1-phenyl-3 -p almityla mino-5 -pyrazolone l-phenyl-S-benzene sulfonylamino-S -pyrazolone l- (p-phenoxyphenol) -3 (p-tert.amyloxybenzoyl amino-S-pyrazolone l- (2,4,6tribromophenyl) -3-benzamido-S-pyrazolone 1- (2',4',6trichlorophenyl) -3-benzamido-S-pyrazolone 1- 2',4,6trichlorophenyl -3 -phenylacetamido-S- pyrazolone 1- (2',4,6tribromophenyl) -3-phenylacetamido-5- pyrazolone 1- (2,4'-dichlorophenyl) -3- 3 "-(2"'-4"-di-te1t.

amyphenoxyacetamido benzamido] -S-pyrazolone l- 2',4,6'-trichlorophenyl -3- (2',4"-di-tert.-amylphenoxy) propionamido] -S-pyrazolone 1- 2,4,6-trichlorophenyl -3- a- (4-nitrophenoxy acetamido] -S-pyrazolone Open chain yellow-dye-forming couplers N-amyl-p-benzoylacetaminobenzenesulfonate N- 4-anisoylacetaminobenzenesulfonyl -N-benzyl-mtoluidine N- (4-benzoylacetaminobenzenesulfonyl) -N-benzyl-mtoluidine N- (4-benzoylacetaminobenzenesulfonyl) -N-n-amyl-ptoluidine N- (4-b enzoylacetaminobenzenesulfonyl) -N-beuzylaniline w.- (p-b enzoylb enzoyl acetanilide w-benzoylacet-Z,5-dichloroanilide w-benzoyl-p-sec.-amylacetanilide N,Ndi w-benzoylacetyl -p-phenylenediamine N,Ndi- (acetoacetamino) diphenyl a{ 3- a- 2,4di-tert.-amylphenoxy) butyramido] benzoyl} -Z-methoxyacetanilide a-{3- [a- 2,4-di-tert.amylphenoxy) acetamido] benzoyl}-2methoxyacetanilide 4,4-diacetoacetamino) -3 ,3 '-dimethyldiphenyl p,p-Di- (acetoacetamino) diphenylmethane Ethyl-p-benzoylacetaminobenzenesulfonate Nonyl-p-benzoylacetaminobenzenesulfonate N-phenyl-N'- (p-acetoacetaminophenyl urea n-Propyl-p-benzoylacetaminobenzenesulfonate acetoacetpiperidine w-Benzoylacetpiperidide N(wbenzoylacetyl) -1,2,3,4-tetrahydroquinolir1e N (w-benzoylacetyl) morpholine The following examples will serve to illustrate further the manner of practicing my invention.

To dierent portions of the same batch of photographic gelatino-silver-bromiodide emulsion were added (l) a simple merocyanine, merocarbocyanine or merodicarbocyanine, (2) a sulfonated derivative of Formula IV above, and (3) a combination of (1) and (2). The emulsions were held for a short time at about Sil-52 C., coated on a transparent support, chill set and dried. The coatings were then exposed to a tungsten light source in an Eastman Sensitometer (Type 1B) through either a Wratten #12 Filter which transmits substantially no light of wavelength shorter than about 495 mu (except for about 1% between 30() and 340 mn, a Wratten #16 Filter which transmits substantially no light of Wavelength shorter than about 520 ma, or a Wratten #58 Filter which transmits only light of wavelength lying between 465 and 620 mu. The lter was selected to correspond to the sensitizing region of the particular simple merocyanine, merocarbocyanine or merodicarbocyanine dye illustrated. The eX- posed coatings were then processed for three minutes in a developer having the following composition:

g. N-methyl-p-aminophenol sulfate 2.0 Hydroquinone 8.0 Sodium sulfite (desiccated) 90.0 Sodium carbonate (monohydrate) 52.5 Potassium bromide 5.0

Water to make 1 liter.

xed in a conventional sodium thiosulfate ixing bath, washed and dried. The speed, gamma and fog for each of the coatings was then measured.

The invention is further illustrated by the following examples.

EXAMPLE l A silver bromoiodide emulsion was made of the type described by Trivelli and Smith, Phot. Journal, vol. 79, 330 (l939). The melted emulsion was divided into separate portions to which were added a solution of the sensitizers I to XVI and XIX to XXIV and combinations of these with sulfonated compounds A and B as indicated in Table l. Each portion was digested at 50 C. for l0 minutes and then coated on a cellulose acetate iilm support and dried. The dried samples were then given identical exposure in an Eastman Sensitometer (Type 1B) through a Wratten #16 Filter of 1 second to a tungsten light source, processed for 3 minutes in the aforementioned developer, fixed, washed and dried. Densitometric measurements were made of the developed images on each coating. The relative speed values were calculated based on an arbritary relative speed of 100 for the coating sensitized with 0.065 g. of Dye I per mole of silver halide and the gamma values determined. These values together with the fog values are given in Table 1.

TABLE 1 Dye and concentration (g. per mol. Relative silver halide) speed Gamma Fog I (.065) 100 4. 80 06 I (.065) plus A (0.86) 224 3. 60 04 I 065) plus B (1 7) 447 3. 76 04 Il (.065) 4. 6 1. 60 12 II (.065) plus B (1.7)--. 26. 5 3. 60 10 III .O7 59 3. 96 08 III (.07) plus B (1.7)..- 355 3.44 04 IV (.07) 49 3. 92 .10 IV (.07) plus B (1.7)- 170 3. 68 07 V (.06) 34 4. 00 08 V (.06) plus B (1 155 3. 86 06 VI 065) 174 3. 94 06 VI 977 3. 80 04 VII 62 4. 90 10 309 4. 20 06 562 4. 20 12 1, 78o 2. s2 .04 39 3. 84 08 234 4. 08 48 5. 25 12 309 5. 00 06 62 4. 70 30 195 4. 50 10 9. 7 4. 40 06 41 3. 44 05 5. 7 2. 30 12 159 4. 80 08 246 5. 00 06 813 3. 62 06 39 5. 00 08 380 3. 80 06 380 4. 50 07 1, 820 3. 40 05 83 3. 84 06 107 3. 52 06 1. 06 04 11. 8 1. 94 04 1, 230 2. 1o .o4 1, 450 2. 08 03 2, 140 3. 50 04 2, 690 3. 26 05 324 3. 46 04 407 2. 64 03 XI 417 3. 72 05 XXIV (.13) plus V (1.7) 708 3. 28 04 It Iwill be noted that in each instance markedly improved sensitivity was obtained by addition of sulfonated compounds A or B to the dye sensitizer.

in Table 2.

TABLE 2 Dye and concentration (g. per mol. Relative silver halide) spoed Gamma Fog XVII (.065) 100 1. 00 08 282 3. 52 05 XVII (.065) plus B (1.7) 400 3. 72 .05

The relative speed Was improved by addition of sulfonated compounds A and B by factors of about 3 and 5, respectively.

EXAMPLE 3 `Coatings were made as in Example 1, excepting that dye sensitizer XVIII and combination thereof with sulfonated compound B were used. These coatings Were exposed through a Wratten #58 Filter, processed and the density values measured. The relative speeds, gamma and fog values are listed below.

TABLE 3 Dye and concentration (g. per mol. Relative silver hallde) speed Gamma Fog XVIII (.065). 1. 80 .07 XVIII (.065) plus B (1.7) 309 4.00 08 The relative speed showed an increase of about 3 times by the addition of sulfonated compound B.

EXAMPLE 4 Coatings were made as in Example 1 excepting that dye sensitizers I, XXV, XXVI and XXVII and combinations of I with sulfonated compounds D, E, -F and G, combination of XXV with sulfonated compound B, and combinations of XWI and XXVII with sulfonated compound C, were used. These coatings were exposed through a Wratten #16 Flter, processed and the relative speeds (based on 100 for Dye XXV), gamma and fog values determined. The results are recorded in Table 4.

TAB LE 4 Dye and concentration (g. per mol. Relative silver halide) speed Gamma Fog XXV (.13) 100 3. 84 .04 159 2. 7 04 65 3. 06 04 135 2. 62 04 8 4 50 07 30 4. 10 04 21. 5 4. 10 06 16. 5 4 50 05 59 3. Q0 04 2 90 04 XXVII (.13) plus B (1.7) 2. 20 .04

In each instance, the sensitivity was markedly increased by the addition of the specified sulfonated compounds to the specified dyes.

EXAMPLE 5 Coatings were -madeas in Example 1, excepting that dye sensitizer XXVIII and combination thereof with sulfonated compound B were used. These coatings were exposed through a Wratten #16 Filter, processed and the density values measured. The relative speed, gamma and fog values obtained are shown in Table 5.

TABLE 5 Dye and concentration (g. per mol. Relative silver halide) speed Gamma Fog XXVIII (.065) 100 2. 04 04 XXVIII (.065) plus B (1.7) 118 2. 72 04 The relative speed was increased 18% by the addition of sulfonated compound B to Dye XXVIII.

EXAMPLE 6 TABLE 6 Dye and concentration (g. per mol. Relative silver halide) speed Gamma Fog XXIX (0.13) 100 4. 00 .o4 XXIX (0.13) plus B (1.7).. 118 2. 90 .05 XXX .1 209 2. 00 06 XXX (0.13) plus B (1.7) 267 3. 30 .10

Substantial increases in relative speeds are shown in the above table by the addition of sulfonated compound B to Dyes XXIX and XXX.

EXAMPLE 7 Coatings were made as in Example 1, excepting that dye sensitizers XXI, XXXII, and XXXIII and combinations of these with sulfonated compound A were used. These coatings were exposed through a Wratten #16 Filter, proc- 13 essed and the relative speeds (based on 100 for Dye XXI), gamrnas and fog values determined. These values are recorded in following Table 7.

14 dye sensitizers LIX to LXIII and combinations of each of these with sulfonated compound A were used. These coatings were exposed through a Wratten #16 Filter, processed and the relative speeds, gamma and fog values TABLE 7 determmed as set forth 1n Table 9. Dye and concentration (g. per m01. Relative 5 silver halide) speed Gamma Fosy TABLE 9 XXXI (0.104) 100. 4.00 04 Dye and concentration (g. per mol. Relative 229. 0 3. 50 04 silver halide) speed Gamma Fog 17.5 3.80 .06 37. 0 2. 40 .06 280 4. so 08 XXXIII (0.104) 6. 3. 70 06 725 3. 0c 04 XXXIII (0.104) plus A (0. 25. 5 3. 80 .06 251 3. 68 .08 550 3. 40 .05 795 4.20 .22 In each mstance, the relative speed was markedly 1n- 1,200 3 00 00 creased, for example, over two fold in the case of Dyes g -g -g XXI and XXXII, and approximately four fold in the 1,200 3,00 .0e case of Dye XXXIII, by combination with sulfonatedcomlggo 2160 1 g pound A. 1,660" 3 50 .14

EXAMPLE 8 Coatings were made as in Example 1, excepting that a silver chlorobromide emulsion and dye sensitizers XXXIV to LVIII and combinations of each of these with sulfonated compound B were used. These coatings were exposed, through a Wratten #16 Filter, except LVI to LVIII which were exposed through a Wratten #4 Filter, processed and the relative speeds (based on 100 for each of Dyes XXXIV, XLVIII, LVI and LVII as indicated), gammas and fog values determined. A Wratten #4 Filter transmits substantially no light of wavelength shorter than about 4.50 mit.

The values obtained are listed 1n Table 8 TABLE 8 Dye and concentration (g. per mol. Relative silver halide) speed Gamma Fog XXXIV (0.26) 100 4.60 04 195 4. 20 04 110 4. 90 04 166 3. 86 04 83 5. 20 04 166 4. 90 04 214 4. 50 04 257 5. 00 04 132 4. 00 06 372 3. 56 03 257 4. 60 04 316 3. 96 04 115 4. 50 04 141 4. 60 04 309 4. 40 04 355 4. 20 O4 289 3. 80 04 562 3. 40 04 16. 5 4. 30 07 35. 3 4. 30 06 60 4. 00 O6 85 3. 08 04 316 4. 00 04 407 3. 30 04 145 4. 20 04 289 3. 20 03 525 4. 00 05 061 3. 02 04 100 5. 60 03 129 4. 50 04 15. 9 3. 68 03 27 3. 42 03 53 2. 96 04 118 2. 96 04 27 2. 98 03 33 2. 58 03 15. 9 2. 8O 03 26 2. 50 03 23 3. 06 03 46 2. 80 03 118 3. 84 O3 339 3. 03 29 4. 00 03 102 3. 40 03 100 3. 70 04 123 3. 10 04 100 2. 50 04 141 2. 80 03 170 4. 10 03 309 3. 80 04 Reference to above Table 8 shows that the relative speeds were substantially increased for each of the specied dye sensitizers when used in combination with sulfonated compound B.

EXAMPLE 9 Coatings were made as in Example 1, excepting that Above Table 9 clearly shows that the relative speeds were substantially increased for each of the specified dye sensitizers when used in combination with sulfonated compound A.

The following example will illustrate the utility of my supersensitizing combinations in coupler incorporating multi-layer elements for color photography.

EXAMPLE l0 Two multi-layer color coatings each comprising a support coated in succession with (l) a blue-sensitive silver halide emulsion containing a yelloW-dye-forming coupler, (2) a green-sensitive silver halide emulsion containing a magenta-dye-forming coupler, and (3) a red-sensitive silver halide emulsion containing a cyan-dye-forming couple and the sensitizer 3-heptyl-1phenyl5{4[3-(3-sulfobutyl)naphtho [2,3 dlthiazolin 2 ylidene] 2-butenylidene} 2 thiohydantoin triethylamine salt were prepared with the variations described below in the red-sensitive emulsion layer. Each coating was exposed to red light on an intensity scale sensitometer using a number 29 Wratten Filter and then processed through the Eastman Color Print Process with the following results.

Mg. of sensi- Mg. of Comtizing dye pound per The accompanying drawing illustrates the supersensi tizing eiect obtained with three of my new combinations in gelatino-silver-bromoiodide emulsion. Each figure of the drawing is a diagrammatic reproduction of two spectrograms. In each figure, the sensitivity of the emulsion containing the merocyanine dye of Formulas I, II or III is represented by the solid lower curve. The upper curve (dotted line) represents the sensitivity conferred on the emulsion by the combination of the merocyanine dye with one of the sulfonated compounds of my invention. No curve illustrating the effect of the sulfonated compound alone is shown, inasmuch as it has been found that these sulfonated compounds have little or no measurable effect on the sensitivity of the emulsions.

In FIG. 1, curve A represents the sensitivity of an ordinary gelatino-silver-bromoiodide emulsion sensitized with 3 (2-diethylaminoethyl-5[(3-ethyl-2-benzothiazolinylidene)-ethylidene]2thio 2,4 oxazolidinedione (Dye I), while curve B represents the sensitivity of the same emulsion sensitized with a combination of about Dye I and Leucophor B (a bis (s-triazin-Z-ylamino) stilbene- 2,2disulfonic acid, sorium salt). The sensitometric measurements for these emulsions are given in above Table 1.

In FIG. 2, curve C represents the sensitivity of an ordinary gelatino-silver-bromoiodide emulsion sensitized with 3 (3 dimethylaminopropyl-S-[(3-ethyl-2-benzothi- 1 5 azolinylidene)isopropylidene]2-thio2,4 oxazolidinedione (Dye VIII), while curve D represents the sensitivity of the same emulsion sensitized with a combination of about Dye VIII and Leucophor B (a bis(s-trazin-Z-ylamino) stilbene-2,2edisulfonic acid, sodium salt). The sensitometric measurements for these emulsions are given in above Table l.

In FIG. 3, curve E represents the sensitivity of an ordinary gelatino-silver-bromoiodide emulsion sensitized with 5- [4- 3-ethyl-2 (3 ot-naiphthothiazolinylidene) -butenylidene] 3 n heptyl 1-phenyl-2-thiohydantoin (Dye XXXI, While curve F represents the sensitivity ofthe same emulsion sensitized with a combination of above Dye XXXI and Calcouor White-MR (a bis(s-triazin-Z-ylamino) stilbene-2,2disulfonic acid, sodium salt. The sensitometric measurements for these emulsions are given in above Table 7.

The term sulfo is used in the foregoing and in the following claims to mean both the free .acid group, `as Well as salts of this free acid group, including alkali metal salts (e.g., sodium, potassium, etc.), ammonium salts, amine addition salts (e.g., triethylamine, ethanolamine, triethanolamine, pyridine, picoline, etc.). These water-soluble salt derivatives can .also be used to advantage.

This invention has been described in detail with particular reference to preferred embodiments thereof, but it Will be understood that variations and modifications can be effected Within the spirit and the scope of the invention as described herein above and as dened in the appended claims.

I claim:

1. A composition comprising at least one merocyanine dye of the formulas:

and

wherein each A represents a member selected from the class consisting of an oxygen atom and a sulfur atom, R represents a group selected from the class consisting of an alkyl lgroup and an aryl group; Z represents the nonmetallic atoms required to complete a 5- to 6-membered heterocyclic nucleus selected from the class consisting of a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a thianaphtheno-7,6,4,S-thiazole nucleus, an oxazole nucleus, a benzoxazole nucleus, a naphthoxozole nucleus, a selenazole nucleus, a benzoselenazole nucleus, a naphthoselenazole nucleus, a thiazoline nucleus, a Z-pyridine nucleus, a 4-pyridine nucleus, a 2- quinoline nucleus, a 4-quinoline nucleus, a l-isoquinoline nucleus, a 3-isoquinoline nucleus, a 3,3-dialkylindolenine nucleus, an imidazole nucleus, a benzimidazole nucleus, and a naphthimidozole nucleus; L represents a methine group; i, m and p each represents an integer of from 1 to 2; k represen-ts an integer of 2 to 3; n represents an integer of from 1 to 3; Q represents a group selected from the class consisting of a -(|JNlI- group, a -S-(|31|\I group, a -O-C-ll'- group Ri W Y W Y a -llv-fl-lgroup, a -(II-(-N group,

Y1 W Y o Y1 o Y C|-N-|C-N- group and a -N-CH=N O Y1 IS Y Y1 R X group; R1 represents a member selected from the class consisting of the hydrogen atom, an alkyl group, an aryl group, an amino group, on acylamino group, a substituted sulfonamido group, a substituted sulfamyl group and a substituted carbamyl group; W represents an atom selected YVfrom the class consisting of oxygen, selenium and sulfur; Y and Y1 each represent a group selected from the class consisting of the hydrogen atom, an alkyl group, an aryl group, a

lgroup; q represents an integer of from 1 to 6; R2, R3 and R4 each represents an' alkyl group; R5, R6, R8 and R9 each represents a member selected from the closs consisting of the hydrogen atom and an alkyl group; and X represents an acid anion; and (2) at least one sulfonic acid derivative of a compound selected from the class consisting of a bis- (triazinylamino)stilbene, a dibenzothiophene dioxide, a biphenyl, a terphenyl, a quaterphenyl, a phenanthrene, a pyrene and .a chrysene. A

2. A composition of claim 1 in which said (2) represents a sulfonic acid derivative of bis(s-triazine-Z-ylamino)stilbene.

3. A composition of claim 1 in which said `(2) represents a sulfonic acid derivative of a dibenzothiophene dioxide.

4. A composition `of claim 1 in -Which said (2) represents a sulfonic acid derivative of a terphenyl.

5. A composition `of claim 1 in which said (2) represents a sulfonic acid derivative of a pyrene.

6. A composition of `claim 1 in which said (2) represents a sulfonic acid derivative of a chrysene.

7. A composition of claim 1 in which said (2) represents a bis( s triazin 2 ylamino) stilbene-2,2'disulfonic acid, sodium salt.

8. A composition of claim 1 in which -said (2) represents 3,7 bis(4-methoxy3sulfobenzamido)-dibenzothiophene dioxide, sodium salt.

9. A composition of claim 1 in which said (2) represents 6 (4-methoxy-3-sulfo-w-phenylacryloyl)pyrene, sodium salt.

A10. A composition of claim 1 in which said (2) represents chrysene-'-sulfonic acid, sodium salt.

11. A composition `of claim 1 in which said (2) re'presents 4,4-bis(2,4-dimethoxy-5-sulfobenzamido) p terphenyl, disodium salt.

12. A composition comprising 3(2-ethylaminoethyl) 5[(3-ethyl-Z-benzothiazolinylidene)ethylidene] 2 -thio- 2,4-oxazolidinedione and a bis(s-triazin-Z-ylamino)stilbene2,2'disulfonic acid, sodium salt.

13. A composition comprising 3-(3-dimethylaminopropyl -5- 3ethyl-Z-benzothiazolinylidene isopropylidene] 2-thio-2,4oxazolidinedione and a bis(s triazin 2 ylamino)stilbene-2,2-disulfonic acid, sodium salt.

14. A composition comprising 5-[4-(3-ethyl2(3) naphthothiazolinylidene) butenylidene] 3 n heptyl-lphenyl-Z-thiohydantoin and a bis(s-triazin-Z-ylamino)stilbene-2,2disulfonic acid, sodium salt.

5su1fobenzamido)-p-terphenyl, disodiurn salt.

References Cited UNITED STATES PATENTS Jones 96-104 Carrol et al. 96-104 Jones 96--104 Kalenda 96-104 Kalenda 96-104 Seidel et al 96-102 J. TRAVIS BROWN, Primary Examiner U.S. C1. X.R.

5 96-104; 252-316; ZSC- 240.4

gg@ UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Pawn No. 3,575,869 Dated April 2o, 1971 Irwencods) Norman W. Kalenda l It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 15, llnes 3S through LLL;

gg UNITED STATES PATENT OFFICE CERTIFICATE 0F CORRECTION Patent No. 3.579.869 Dated April 20, 1971 Inventor(s) Norman W. 'Kalenda PAGE 2 It is certified that error appears in the aboue-identified patent and that said Letters Patent are hereby corrected as shown below:

r- Column 1S, line 73 "naphthmdozole" should read "naphthmda zo le" Column 16, line 3 -C-N-N- group, should read -CT-N-N- group, "3

l Rl

Column 16, line 9 Il! 1A Column 16, line 12 "on" should read "an"; and

Column 16, line 31 "Gloss" should read "class".

Signed and sealed this 214th day of August 1971.

(SEAL) Attest:

EWARI D M.FLETCHER,JR. WILLIAM E. SCHUYLER, JR. 

